This stand-up comedy phenom of the 1990s fleetingly turned sitcom lead as the star of "All-American Girl" (ABC, 1994-95). Cho skillfully mined the many contradictions and absurdities of her dual heritage as a twenty-something Korean-American to generate laughs while exposing and exploding ethnic and sexual stereotypes from within and without.Cho began performing stand-up while enrolled in the theater program at San Francisco State University. The comedy club where she began developing her act was conveniently located above the bookstore owned by her immigrant parents. Cho became a fixture on